/Engine/Source/Runtime/PakFile/Public/IPlatformFilePak.h
InOutDirectoryIndex - The full index from which to potentially remove entries OutDirectoryIndex - If null, InOutDirectoryIndex will have pruned entries removed. If non-null, InOutDirectoryIndex will not be modified, and PrunedDirectoryIndex will have kept values added. MountPoint The mount point for the pak containing the index, used to provide the fullpath for filenames in the DirectoryIndex for comparison against paths in ini
static void PruneDirectoryIndex ( [FDirectoryIndex](API\Runtime\PakFile\FPakFile\FDirectoryIndex) & InOutDirectoryIndex, [FDirectoryIndex](API\Runtime\PakFile\FPakFile\FDirectoryIndex) * PrunedDirectoryIndex, const [FString](API\Runtime\Core\Containers\FString) & MountPoint )